Been looking at Bassmasters magazine & have noticed something about the poundage of line they are using, be it mono or flouro.

The pro's seem to go w/ much heavier line ratings like 14 lbs-20 lbs.  More I've noticed in the 17-20 lbs especially flouro.  It seems they used the heavier lines for most of their fishing techniques.

I guess since I don't fish tourney's that I find this interesting.  Here I am thinking that using lines in 12 lbs or so is more desirable for less line visibility.

So my question is, should I bump up my line ratings on my baitcast reels to 17-20 lbs?  Does this give better sensitivity, strength & abrasion resistance than lower line ratings like 8-12 lbs?

I wouldn't let what the pros use be your guide to deciding on which line test to use.  Your line choice is dictated by many variables such as(but not limited to)--water color, cover, what depth the fish are at, what kind of lure you're using, etc.  Your twelve pound line is ample for most applications, if you start running into heavy cover you may need to up your line weight.  If you're in a tourney you may also need to upgrade your line, for that added security.  If you go to clearer water you may need to downgrade your line weight.  There really isn't a clear cut answer.  I use the heaviest line I think I can get away with given the current water and cover conditions.

When money is on the line, the fishermen tend to use the heaviest line possible. The mindset is not to have fun and play the fish but more of a get the fish in the boat as quick as possible. Breakoffs cost you money.